This question originally appeared on Quora: When should A/B testing not be trusted to make decisions? Answer by Edwin Chen, Ex: math and linguistics at MIT, speech recognition at Microsoft Research, ...

I love A/B testing! It’s hard for me to imagine my life without it, and once you try it, you’ll never go back. Why? Because A/B testing (also called split testing) can improve your effectiveness, and ...

Too often they measure meaningless variants, produce inconclusive results, and nothing comes from them. Of course, some A/B tests yield real, meaningful, actionable results. Those are the ones you ...

A/B testing is nothing new. So why do so many businesses still fail to do it? Conducting online A/B and multivariate testing is nothing new. The practice has been around for decades now, with Google ...

Opinions expressed by Entrepreneur contributors are their own. A/B testing is often regarded as one of the most important components of any marketing strategy. After all, you won’t truly know whether ...

The Wikipedia fundraising team was performing up to 100 AB tests per week. It wasn’t enough to find the gains needed. The team needed to use statistics to interpret their AB tests accurately, but also ...

I think it's safe to say that by about 2010, email marketing was a full-fledged marketing tactic. If your business wasn't using it to engage with consumers, then you may have been missing out on ...

Many nonprofits in low- and middle-income countries face a critical mismatch: urgent social problems demand rapid program iteration, yet organizations often wait years for externally-produced ...

Data will tell you the right answer. If you can’t find data somewhere, you should run a test, collect the data, and let it tell you what’s right. A/B testing is one of the core marketing arts a ...

Learn how A/B testing and multivariate testing impact SEO and 8 tips to improve your tests and processes to maximize your site's SEO performance. To be successful in SEO, we need to have an ...